<template>
  <div>
    <h3>分类参数</h3>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 警告区域 :closable="false"(是否展示“X”号) show-icon(显示图标) -->
      <el-alert
        title="注意：只允许为第三级分类设置相关参数"
        type="warning"
        :closable="false"
        show-icon
      >
      </el-alert>

      <!-- 选择商品分类区域 添加按钮 -->
      <el-row class="cat_opt">
        <el-col :span="3">
          <span>选择商品分类：</span>
          <!-- 选择商品分类的级联选择框 -->
        </el-col>
        <el-col :span="11">
          <HMselect :level="3" :onChange="parentChange"></HMselect>
        </el-col>
      </el-row>

      <!-- tab页签区域 -->
      <el-tabs v-model="activeTabName" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 将标签页改为many -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            size="mini"
            type="primary"
            :disabled="isButtonDisabled"
            @click="addDialogVisible = true"
            >添加动态参数</el-button
          >
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i, scope.row)"
                  >{{ item }}</el-tag
                >
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <!-- 添加静态属性的面板 将标签页改为only -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            size="mini"
            type="primary"
            :disabled="isButtonDisabled"
            @click="addDialogVisible = true"
            >添加静态属性</el-button
          >
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i, scope.row)"
                  >{{ item }}</el-tag
                >
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加按钮 -->
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template>
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加参数或属性对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 添加表单 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改参数或属性对话框 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 添加表单 -->
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import HMselect from "../../componentsHM/HMselect.vue"
import { getCateParamsAPI, addCateParamsAPI, chkEditCateParamsAPI, EditCateParamsAPI, delCateParamsAPI, putCateParamsAPI } from "@/api"
export default {
  components: {
    HMselect
  },
  data () {
    return {
      cateList: null,
      activeTabName: "many",//属性 ID
      selectKeys: [],//分类ID
      edidID: 0,
      //用来保存动态参数数据
      manyTableData: [],
      //用来保存静态属性数据
      onlyTableData: [],
      //控制添加参数.属性对话框的显示或隐藏
      addDialogVisible: false,
      //添加参数的表单数据对象
      addForm: {
        attr_name: ''
      },
      //添加表单验证规则
      addFormRules: {
        attr_name: [{ required: true, message: '请输入名称', trigger: 'blur' }]
      },

      //控制修改参数.属性对话框的显示或隐藏
      editDialogVisible: false,
      //修改参数.属性对话框中的表单
      editForm: {
        attr_name: ''
      },
      //修改表单的验证规则
      editFormRules: {
        attr_name: [
          { required: true, message: '请输入名称', trigger: 'blur' }
        ]
      }

    }
  },


  methods: {
    // 子组件事件
    async parentChange (selectKeys) {
      // 将下拉框传来的 分类id数组 设置给data
      this.selectKeys = selectKeys
      // console.log(this.selectKeys);
      this.getCateParams()
    },

    // 封装 加载分类的参数
    async getCateParams () {
      // 如果没有选中分类 则返回
      if (this.selectKeys.length !== 3) return;
      // 发送异步请求 获取 当前选中的第3级分类 动态/静态 数据
      const { data: res } = await getCateParamsAPI(
        this.selectKeys[2],//下拉框的最后一个分类id
        this.activeTabName//选项卡的name值
      );
      // console.log(res);
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      })

      if (this.activeTabName === 'many') {
        //获取的是动态参数
        this.manyTableData = res.data
      } else if (this.activeTabName === 'only') {
        //获取的是静态属性
        this.onlyTableData = res.data
      }
    },

    // tab栏点击事件 选项卡发生改变
    handleTabClick () {
      this.getCateParams()
    },

    //当关闭修改参数.属性对话框时
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    //当用户点击对话框中的确定时，校验表单
    async addParams () {
      this.$refs.addFormRef.validate(async valid => {
        //校验不通过，return
        if (!valid) return
        //校验通过，发送请求完成添加参数或者属性
        const { data: res } = await addCateParamsAPI(
          this.selectKeys[2],
          this.addForm.attr_name,
          this.activeTabName,

        )

        // console.log(res)
        if (res.meta.status !== 201) {
          return this.$msg.error('添加' + this.titleText + '数据失败')
        }
        this.$msg.success('添加' + this.titleText + '数据成功')
        this.addDialogVisible = false
        this.getCateParams()
      })
    },

    //发起请求获取需要修改的那个参数数据
    async showEditDialog (attr_id) {
      this.editId = attr_id//讲获取来的被编辑的属性id保存下来
      const { data: res } = await chkEditCateParamsAPI(
        this.selectKeys[2],
        attr_id,
        this.activeTabName,
      )
      console.log(res);
      if (res.meta.status !== 200) {
        return this.$msg.error('获取参数数据失败')
      }
      this.editForm = res.data;
      //显示修改参数.属性对话框
      this.editDialogVisible = true;
    },
    editDialogClosed () {
      //当关闭修改参数.属性对话框时
      this.$refs.editFormRef.resetFields()
    },

    // 点击按钮，修改参数信息
    async editParams () {
      //验证表单
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return;

        //发送请求完成修改
        const { data: res } = await EditCateParamsAPI(
          this.selectKeys[2],
          this.editId,
          this.editForm.attr_name,
          this.activeTabName
        )
        console.log(res);

        if (res.meta.status !== 200) {
          return this.$msg.error('获取参数数据失败')
        }
        this.$msg.success('修改' + this.titleText + '数据成功')
        this.editDialogVisible = false
        this.getCateParams();
      })
    },

    // 添加对应的事件处理函数
    async removeParams (attr_id) {
      //根据id删除对应的参数或属性
      //弹窗提示用户是否要删除
      const confirmResult = await this.$confirm(
        '请问是否要删除该' + this.titleText,
        '删除提示',
        {
          confirmButtonText: '确认删除',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      //如果用户点击确认，则confirmResult 为'confirm'
      //如果用户点击取消, 则confirmResult获取的就是catch的错误消息'cancel'
      if (confirmResult != 'confirm') {
        return this.$message.info('已经取消删除')
      }

      //没有取消就是要删除，发送请求完成删除
      const { data: res } = await delCateParamsAPI(
        this.selectKeys[2],
        attr_id,
      )

      if (res.meta.status !== 200) {
        return this.$msg.error(res.meta.msg)
      }
      this.$msg.success('删除' + this.titleText + '数据成功')
      this.getCateParams()
    },

    // 文本框失去焦点，或摁下了 Enter 都会触发
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      // 如果没有return，则证明输入的内容，需要做后续处理
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      // 需要发起请求，保存这次操作
      this.saveAttrVals(row)
    },

    // 将对 attr_vals 的操作，保存到数据库
    async saveAttrVals (row) {
      // 需要发起请求，保存这次操作
      const { data: res } = await putCateParamsAPI(
        this.selectKeys[2],
        row.attr_id,
        row.attr_name,
        row.attr_sel,
        row.attr_vals.join(','))

      if (res.meta.status !== 200) {
        return this.$msg.error('修改参数项失败！')
      }

      this.$msg.success('修改参数项成功！')
    },
    // 点击按钮，展示文本输入框
    showInput (row) {
      row.inputVisible = true
      // 让文本框自动获得焦点
      // $nextTick 方法的作用，就是当页面上元素被重新渲染之后，才会指定回调函数中的代码
      this.$nextTick(() => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    // 删除对应的参数可选项
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    //添加计算属性用来获取按钮禁用与否
    isButtonDisabled () {
      if (this.selectKeys.length !== 3) {
        return true
      }
      return false
    },
    //获取选中的三级分类id
    cateId () {
      if (this.selectKeys.length == 3) {
        return this.selectKeys[2]
      }
      return null
    },
    titleText () {
      if (this.activeTabName == 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  },
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}

.input-new-tag {
  width: 120px;
}
</style>